I probably should have copied this to the relevant kernel wireless mailing lists. Anyway, here it is. As a further datum point, the b43 driver works fine with the 4.15.0-rc3 kernel. So something seems to have changed between that and 4.15.0. Chris Begin forwarded message: Date: Mon, 29 Jan 2018 23:37:49 +0000 From: Chris Vine <vine35792468@xxxxxxxxx> To: Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx> Subject: Regression: bcm4312 lp-phy device not recognized in 4.15 kernel I have an old netbook with a Broadcom bcm4312 802.11b/g lp-phy [14e4:4315] (rev 01) wifi device. It is no longer recognized in kernel 4.15: it works fine with the 4.14 kernel and earlier, with the b43 and ssb kernel modules. I cannot give any further information as there are no error messages logged. The b43 firmware (wl-5.100.138) is not loaded for it, nor are the ssb/b43/bcma/ mmc_core/mac80211/cfg80211 modules. The modules can be loaded by hand without error, but nothing happens and no network interface is presented. This is a pretty slow and rubbish netbook but is useful when travelling to a country which might impound your laptop (no names) and you don't mind too much losing it. It would be nice to continue to be able to use it for that. Chris
